03 CRF 450 488KIT, V&H HEAD WORK

By wilsonje, Posted October 24, 2004

i just put my o3 crf450 back togother. i installed the athena 488 kit, and also had vance & hines hear in INDY do there top of the line head work. which included kibblewhite black diamond stainless valves,there racing valve spring kit,a hot cams stage 2 cam, a full race team spec, port & valve job, welding on exhaust ports ,epoxy in the intakes, t his thing should rock!!! my question is where to start on the jeting? im at apr. 800 feet hear in indy. should i just start with factory jeting and see how it runs. also has anyone tryed the cam 2 racing gas? i can get it hear close to my house for 3.49 gal. it has lead in it. could help with valve life? this is not much more the top line pump gas hear apr. 2.39 gal. you cant get VP U-4 local hear. and its 10.00 a gal. wear you can. thanks for any help anyone can offer.

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This replaces the tube that connects the two carbs on a 1987 Honda XR600R (it may fit other years).
Made in the USA.
Constructed of TPU (solvent safe plastic.)
Its durable stiff abrasion resistant yet flexible enough you never have to worry about breaking it when you're taking apart your carbs.
Fits the o-ring perfectly and slips into the carb nice and tight.
Matches the rear shock coil.
If you would like to buy one contact me via e-mail. They cost $40 Shipping is free (anywhere in the USA). $10 off for active duty or retired military.
Cjmrizek@gmail.com
Make your subject: XR600r

This replaces the tube that connects the two carbs on a 1987 Honda XR600R (it may fit other years).
Made in the USA.
Constructed of TPU (solvent safe plastic.)
Its durable stiff abrasion resistant yet flexible enough you never have to worry about breaking it when you're taking apart your carbs.
Fits the o-ring perfectly and slips into the carb nice and tight.
Matches the rear shock coil.
length is Aprox. 34mm
If you would like to buy one contact me via e-mail. They cost $40 Shipping is free (anywhere in the USA). $10 off for active duty or retired military.
Cjmrizek@gmail.com
Make your subject: XR600r

This replaces the tube that connects the two carbs on a 1987 Honda XR600R (it may fit other years).
Made in the USA.
Constructed of TPU (solvent safe plastic.)
Its durable stiff abrasion resistant yet flexible enough you never have to worry about breaking it when you're taking apart your carbs.
Fits the o-ring perfectly and slips into the carb nice and tight.
Matches the rear shock coil.
If you would like to buy one contact me via e-mail. They cost $40 Shipping is free (anywhere in the USA). $10 off for active duty or retired military.
Cjmrizek@gmail.com
Make your subject: XR600r

I bought a 2006 YZ250, have ridden it 5 times. It needs some tuning, but I am not sure I'm keeping it so don't want to spend much on it.
Has fmf gnarly expansion chamber and turbine core silencer.
I ride about 1000 feet above sea level.
I'm going to clean the carb and check the jetting. What is a good jetting for me? 85 main jet?
Also check the reeds. Is there a big difference between getting aftermarket reed cage and reeds or just getting a cheap aftermarket set of reeds that fit the stock cage ie. Boyesen Power Reeds?
The other things I'm going to do is permatex all the joints in the exhaust system and a compression test. It was 220psi 5 rides ago so I'm guessing itll be fine. Its bogging a bit but I'm thinking its carb and definitely exhaust joint related.
Let me know if I'm overlooking anything that could make the bike run crisper and more bottom end without throwing much money on parts

I bought a 2006 YZ250, have ridden it 5 times. It needs some tuning, but I am not sure I'm keeping it so don't want to spend much on it.
Has fmf gnarly expansion chamber and turbine core silencer.
I ride about 1000 feet above sea level.
I'm going to clean the carb and check the jetting. What is a good jetting for me? 85 main jet?
Also check the reeds. Is there a big difference between getting aftermarket reed cage and reeds or just getting a cheap aftermarket set of reeds that fit the stock cage ie. Boyesen Power Reeds?
The other things I'm going to do is permatex all the joints in the exhaust system and a compression test. It was 220psi 5 rides ago so I'm guessing itll be fine. Its bogging a bit but I'm thinking its carb and definitely exhaust joint related.
Let me know if I'm overlooking anything that could make the bike run crisper and more bottom end without throwing much money on parts